Improvement in bobbin for sewing-machine shuttles



waited gratta @atentmijiiw '1a. s. MERS-HUN, or zANEsVILLE, oHio.

Letters Patent No. 93,463, elated August 10, 1869.

IMPROVEMENT IN BOBBIN POR SEWING-MACHINE SHUTTLES.

The Schedule referred to in these Letters Patent and making part of the same To all 'whom 'it may concern Be it known that I, R. S. MERSHON, of Zanesville,

, in the county of Muskingum, and State of Ohio, have invented a new and improved Bobbin for Sewing-Ma chine Shuttles; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompany ing drawings, formingpart of this specification.

My invention consists in constructing a tubular bobbin, having one xed and one movable pivot or jonrnal, said pivot being operated or forced outward, to maintain the bobbin .in its place? in the shuttle, by a spiral spring, enclosed within the tube of the bobbin,

andV arranged to bear against `the inner end of theI pivot. The said pivot is forced inward against the, spring by the hand when the bobbin is to be put in or taken out ofthe shuttle, the object of which is to produce a more perfect tension on `the thread, to admit of the bobbin being made of greater capacity, and to provide a more durable and reliable arrangement.

l'n the accompanying drawings., a .partial plan and" f horizontal view of a shuttle provided with my improved bobbin is represented;

Hitherto, the pivots or journals ofthe bobbins have improved arrangement, ne occupied by the shuttle, allowing a corresponding increase in the size of the same; and, secondly, in order` to occupy as little of such space as possible, the springs are commonly so short as to soon become set, and, consequently, useless, and at best givingvery unsatisfactory results.v

According to my improved arrangement, I make the bobbins tubular from end toend, or nearly so, as represente/d -at A, and insert a movablev journal, B, with a spiral spring, C, behind it.

1n order to prevent the journal from falling out, I'

provide a recess, as represented at a, in the side, and

punch the shell ofthe tube down int-o the said recess,

as shown at b, sufliciently to prevent it from falling ont, while allowing it to slide freely for its proper action. A

This plan admits of arranging the spring within the space occupied by the bobbinfand at the same time making it of s'niiicient length to give it ample play without unduly straining or disarranging it.

Having thusdescribed my invention, I claim as new, and desire to secure by Letters Patent- As an article of manufacture, a shuttle-bobbin hav ing one` of its projecting journals stationary, land the other arranged to move longitudinally in the bobbin, a spring to press on the movable journal, and a pin or projection in the bobbin, entering agroove in the movable spindle, to prevent its falling out, all constructed as described.

It. S.A MERSHON. Vitnesses:

J ons, QUIGLEY, GHAnLns MCGLAREN. 

